Well, I took my 12 year old to the show, and she LOVED it. (She also just started 6th grade) I probably won't let her read the book quite yet, it has some adult content.
The show was slightly different than the book. I mean, the story was still pretty much the same, but kind of had to move faster than the book, you know what I mean? If it went at the same pace as the book, it would have been much, much longer and not as entertaining, probably. Some of the characters are slightly different...or, should I say, appear in a slightly different order and in slightly different ways. But nothing too dramatically different. I would definitely recommend taking him, as it was a really dazzling show. My daughter smiled through the entire thing and did NOT stop going on about how wonderful it was all the way home!
We saw the Broadway Touring Company perform it, so I don't know if that made it better. The woman that played Elphaba was Ana Gasteyer...she does the Martha Stewart impressions on Saturday Night Live. She ROCKED.
Anyway....defi nitely take him.